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JP2007067960

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DESCRIPTION JP2007067960
PROBLEM TO BE SOLVED: To provide a small-sized, high sound pressure, constant directivity
cone type speaker device. SOLUTION: The speaker device 1 includes an enclosure 3, a plurality of
cone speaker units 5a and 5b arranged side by side in front of the enclosure 3, and a horn
provided on the front side of the plurality of cone speaker units 5a and 5b. And 7 are provided.
The horn unit 7 extends forward from the plurality of cone speaker units 5a and 5b, and then is
folded back inside to back, and a plurality of unit-turned horn portions 21a that merge with each
other at the merging point 25 between the plurality of cone speaker units 5a and 5b. , 21b, and a
synthetic horn portion 23 extending forward from the merging point 25 through a plurality of
unit-specific turnback horn portions 21a and 21b. [Selected figure] Figure 1
Speaker device
[0001]
The present invention relates to a speaker apparatus in which a plurality of cone speaker units
are arranged.
[0002]
Conventionally, a speaker apparatus with a cone is known as one type of speaker apparatus.
This type of speaker device includes a cone speaker unit, and the cone speaker unit includes a
driver and cone paper. Multiple cone speaker units may be arranged in the enclosure. Such a
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speaker device is mainly used in the middle to low frequency range of about 200 to 2 kHz.
[0003]
Patent Document 1 discloses a speaker device in which a plurality of speaker units are
synthesized by a horn. The horn branches into two on the inlet side, and two speaker units are
attached to the inlets of the two branches, respectively. As the number of speaker units increases,
the sound pressure increases and a large volume can be obtained. JP-A-6-78389 (Page 2-3, FIG.
1)
[0004]
However, in the conventional cone type speaker device, since a certain distance is required
between the cone speaker units, a phase difference occurs between the speaker units, the sound
pressure is reduced, and the directivity is difficult to be constant. There was a problem.
Moreover, in the speaker apparatus of patent document 1, there is a problem that a horn is long
in the front-back direction, and a speaker apparatus enlarges. As a cone type speaker device, it is
required to be compact, have high sound pressure, and have a constant directivity.
[0005]
The present invention has been made to solve the conventional problems, and its object is to
provide a compact, high sound pressure, constant directivity speaker device.
[0006]
A speaker device according to the present invention includes an enclosure, a plurality of cone
speaker units arranged in line in the front direction on the enclosure, and a horn portion
provided on the front side of the plurality of cone speaker units, the horn portion A plurality of
unit-specific turnback horn portions extending forward from the plurality of cone speaker units
and then folded back inside and backward and merging with each other at a merging point
between the plurality of cone speaker units; And a synthetic horn portion extending forward
through between the unit-specific folded horn portions.
[0007]
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With this configuration, a horn is provided in front of a plurality of cone speaker units, and a
plurality of unit-specific folded horns and a synthesis horn between them are provided in the
horn. Therefore, high sound pressure and constant directivity are obtained by combining a
plurality of cone speaker units. Speaker device can be provided.
Further, since the horn portion is folded back, the length in the front-rear direction of the horn
portion can be reduced, and the speaker device can be miniaturized.
[0008]
The speaker device according to the present invention is provided on the outer side of the
plurality of cone speaker units, and is provided on the outer side of the plurality of outer inclined
walls extending forward and inward and the inner side of the plurality of cone speaker units And
a plurality of first inner sloped walls extending toward the inner side, and a gap is provided
inside the plurality of first inner sloped walls, extending forward and outward, and connected to
the plurality of outer sloped walls at the front side And a plurality of second inner inclined walls.
[0009]
According to this configuration, the unit-specific folded horn portion is configured of the first
zone between the outer inclined wall and the first inner inclined wall, and the second zone
between the first inner inclined wall and the second inner inclined wall. Be done.
The synthetic horn portion is composed of zones between the second inner sloped walls on both
sides.
Therefore, it is possible to provide the horn portion including the unit-specific folded horn
portion and the synthetic horn portion with a simple configuration. In addition, the first zone has
a shape that can be narrowed toward the front, so that the phase adjustment function can be
obtained and the sound quality can be improved.
[0010]
The speaker device according to the present invention includes a partition wall extending
forward between the plurality of cone speaker units, and the plurality of unit-specific return
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horns are bent forward by the partition wall and then merge.
[0011]
With this configuration, the sound pressure can be prevented from being transmitted between
the unit-specific folded horn portions, and the sound pressure can be effectively increased.
[0012]
In the present invention, by providing a horn unit in front of a plurality of cone speaker units and
providing a plurality of unit-specific folded horns and a synthetic horn unit between them in the
horn unit, downsizing is possible, such as high sound pressure and constant directivity. A speaker
device having an effect can be provided.
[0013]
Hereinafter, a speaker device according to an embodiment of the present invention will be
described with reference to the drawings.
[0014]
The speaker apparatus which concerns on embodiment of this invention is shown in FIGS.
1 and 2 are a cross-sectional view and a longitudinal cross-sectional view that pass through the
center of the cone speaker unit.
3 and 4 are a front view and a perspective view.
In FIG. 1 and FIG. 2, the speaker device is cut along the line AA and the line BB in FIG.
The construction of the detail of the cross section is omitted and indicated by hatching.
[0015]
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In the following description, as shown in FIG. 1, the side near the center of the entire speaker
device is referred to as inner side . Further, the side close to the left and right ends of the
entire speaker device is referred to as "outside". That is, "inside" is the side near the center of the
left and right cone speaker units, and "outside" is the side far from the center of the left and right
cone speaker units. The other directions (front-back, left-right, up-down) are as shown in FIGS.
[0016]
As illustrated, the speaker device 1 includes an enclosure 3, four cone speaker units 5a, 5b, 5c,
and 5d arranged in a row facing the front to the enclosure 3, and cone speaker units 5a, 5b, 5c,
and 5d. And a horn unit 7 provided on the front side of the unit.
[0017]
The enclosure 3 is a wooden substantially rectangular box.
The cone speaker units 5a, 5b, 5c and 5d are for the midrange of about 200 to 2 kHz, and are
composed of a driver and cone paper. The cone speaker units 5a, 5b, 5c, 5d are attached to the
enclosure 3 with a bracket or the like not shown facing forward. As illustrated, the four cone
speaker units 5a, 5b, 5c, and 5d are arranged in the horizontal direction and the vertical
direction, and are arranged at the upper left, upper right, lower left, and lower right, respectively.
[0018]
The horn unit 7 is attached to the front of the enclosure 3. The horn unit 7 is disposed on the
front side of the four cone speaker units 5a, 5b, 5c, 5d so as to cover the cone speaker units 5a,
5b, 5c, 5d. An upper plate and a lower plate of the enclosure 3 extend forward to cover the upper
and lower sides of the horn portion 7. The horn 7 is also attached to the extension of these upper
and lower plates. The horn unit 7 is composed of a plurality of wooden boards vertically erected
between the upper and lower boards.
[0019]
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The horn unit 7 has a function of synthesizing sounds output from a plurality of cone speaker
units as described below. In the present embodiment, the horn unit 7 synthesizes the sound of
the upper cone speaker units 5a and 5b, and synthesizes the sound of the lower cone speaker
units 5c and 5d. That is, the upper cone speaker units 5a and 5b correspond to the plurality of
cone speaker units of the present invention, and the lower cone speaker units 5c and 5d
correspond to the plurality of cone speaker units of the present invention.
[0020]
Therefore, in the following, in order to simplify the description, the configuration of the horn unit
7 will be mainly described focusing on the positional relationship with the upper cone speaker
units 5a and 5b. However, the horn unit 7 has the same configuration also in the positional
relationship with the lower cone speaker units 5c and 5d.
[0021]
The horn unit 7 is composed of a plurality of plates erected in the vertical direction as described
above. The cross-sectional shape of the horn 7 is symmetrical in the left-right direction and
uniform in the height direction. As shown in FIG. 1, the horn unit 7 has a second inner inclined
wall 15 a further inside than the left and right outer inclined walls 11 a and 11 b and the first
inner inclined walls 13 a and 13 b and the first inner inclined walls 13 a and 13 b. , 15b and a
central dividing wall 17.
[0022]
The left and right outer inclined walls 11a and 11b are provided outside the left and right cone
speaker units 5a and 5b, respectively. The outer inclined walls 11a, 11b start from the outer
ends of the cone speaker units 5a, 5b and extend forward and inward, thereby extending in front
of the cone speaker units 5a, 5b. The end of each outer inclined wall 11a, 11b is located in front
of the central portion of each cone speaker unit 5a, 5b.
[0023]
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The left and right first inner inclined walls 13a and 13b are respectively provided inside the left
and right cone speaker units 5a and 5b. The first inner inclined wall 13a, 13b starts from the
inner end of the cone speaker unit 5a, 5b and extends forward and outward, thereby extending in
front of the cone speaker unit 5a, 5b. The ends of the first inner inclined walls 13a, 13b are
closer to the cone speaker units 5a, 5b as compared to the outer inclined walls 11a, 11b.
[0024]
The left and right second inner inclined walls 15a and 15b are respectively on the inner side than
the first inner inclined walls 13a and 13b, and are provided with a gap from the first inner
inclined walls 13a and 13b. The second inner inclined walls 15a, 15b extend forward and
outward and are connected to the front ends of the outer inclined walls 11a, 11b. The other ends
of the second inner inclined walls 15 a and 15 b are terminated without reaching the enclosure
3.
[0025]
The shape of the second inner inclined walls 15a, 15b may be described as follows. That is, the
outer inclined walls 11a and 11b are bent inward and backward in front of the central portions
of the cone speaker units 5a and 5b, and obliquely extend on the inner side of the first inner
inclined walls 13a and 13b. , 15b is formed. The second inner sloping walls 15a, 15b extend
towards the front of the enclosure between the cone loudspeaker units 5a, 5b, but end before
reaching the enclosure 3.
[0026]
Also, in more detail, the outer inclined walls 11a and 11b and the second inner inclined walls 15a
and 15b are connected via a horizontal connecting portion. The second inner inclined walls 15a
and 15b are bent halfway so that the gap between the second inner inclined walls 15a and 15b
spreads in a flared manner.
[0027]
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The partition wall 17 is located at the center of the enclosure 3 (a position between the cone
speaker units 5a and 5b) and extends forward from the enclosure 3 as illustrated. The partition
wall 17 is a relatively low wall.
[0028]
With the above-described configuration, the horn unit 7 is a combined horn unit 23 formed by
the merging of the unit-by-unit folding horns 21a and 21b extending from the cone speaker units
5a and 5b and the unit-by-unit folding horns 21a and 21b. And to achieve.
[0029]
The unit-specific folded horn portions 21a and 21b extend forward from the cone speaker units
5a and 5b and then are folded back inward and backward to merge into the merging point 25
between the cone speaker units 5a and 5b.
More specifically, the unit-specific return horns 21a and 21b are configured by first zones 31a
and 31b and second zones 33a and 33b following them.
[0030]
The first zones 31a and 31b are areas surrounded by the outer inclined walls 11a and 11b and
the first inner inclined walls 13a and 13b. The first zones 31a and 31b become narrower toward
the front. The unit-specific folding horns 21a and 21b are folded inward and backward at the
folding point in front of the first zones 31a and 31b to start the second zones 33a and 33b.
[0031]
The second zones 33a and 33b are areas surrounded by the first inner inclined walls 13a and
13b and the second inner inclined walls 15a and 15b. The second zones 33a and 33b function as
passages (sound paths) connecting the first zones 31a and 31b and the merging point 25.
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[0032]
The unit-specific return horns 21a and 21b are bent forward by the partition wall 17 at the end
of the second zones 33a and 33b, reach the merging point 25, and merge at the merging point
25. As described above, the horn unit 7 has the second folded structure near the junction.
[0033]
The synthetic horn portion 23 is a region (space) between the second inner inclined walls 15a
and 15b on both sides. The synthetic horn portion 23 starts from the joining point 25 and
extends forward between the unit-by-unit folded horn portions 21a and 21b on both sides. Since
the second inner inclined walls 15a and 15b are inclined forward and outward, the composite
horn portion 23 flares forward as it goes forward, and has an appropriate shape as a horn outlet.
[0034]
The configuration of the speaker device 1 according to the present embodiment has been
described above. Next, the operation of the speaker device 1 will be described. As the whole
operation, when the cone speaker units 5a and 5b make a sound, the sound passes through the
unit-specific folded horns 21a and 21b, merges at the merging point 25, passes through the
merging horn 23, and is emitted forward.
[0035]
At the front of the cone speaker units 5a and 5b, the first zones 31a and 31b before being folded
back narrow as they go forward. As a result, the transmission of the phase-shifted sound is
limited, and suitable phase adjustment is performed. Here, a preferable phase adjustment effect
can be obtained by the midrange speaker as in the present embodiment. The sound after phase
adjustment is turned back at the first turning point, and travels through the second zones 33a
and 33b. Then, a second turn-back is performed on the partition wall 17, and the sound travels
forward.
[0036]
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Due to the partition wall 17, the sound path directions of the two unit-turned-back horns 21 a
and 21 b are directed forward, directed in the same direction, and reach the merging point 25.
The partition wall 17 prevents the sound pressure from being transmitted between the two unitspecific folded horn portions 21a and 21b, and prevents the sound pressure reduction of the
speaker device 3, thereby increasing the sound pressure.
[0037]
Then, the sounds of the two unit return horns 21a and 21b are synthesized by the synthesis horn
23 and emitted forward. Thus, the horn unit 17 synthesizes the sounds from the two cone
speaker units 5a and 5b and outputs the synthesized sound from one synthesized horn, so that
high sound pressure and constant directivity can be realized.
[0038]
Here, the speaker operation has been described focusing on the upper cone speaker units 5a and
5b, but the operation regarding the lower cone speaker units 5c and 5d is the same. This point is
also apparent from the fact that the cross section of the horn 7 is uniform in the longitudinal
direction.
[0039]
The speaker device 1 according to the embodiment of the present invention has been described
above. According to the present embodiment, the horn unit 17 is provided in front of the
plurality of cone speaker units 5a to 5d, and the unit-by-unit folding horns 21a and 21b and the
synthetic horn unit 23 between them are provided in the horn unit 17. A high sound pressure
and constant directivity speaker device 1 can be provided by combining the plurality of cone
speaker units 5a to 5d. Further, since the horn unit 7 is folded back, the length in the front-rear
direction of the horn unit 7 can be reduced, and the speaker device 1 can be miniaturized.
[0040]
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Further, according to the present embodiment, the horn portion 7 is configured by the abovedescribed outer inclined walls 11a and 11b, the first inner inclined walls 13a and 13b, and the
second inner inclined walls 15a and 15b. With this configuration, the unit-specific return horns
21a and 21b are the first zones 31a and 31b between the outer inclined walls 11a and 11b and
the first inner inclined walls 13a and 13b, and the first inner inclined walls 13a and 13b. And
second zones 33a, 33b between the second inner inclined walls 15a, 15b. The synthetic horn
portion 23 is constituted by a zone between the second inner inclined walls 15a and 15b on both
sides. Therefore, it is possible to provide the horn unit 7 including the unit-specific folded horn
units 21 a and 21 b and the synthetic horn unit 23 with a simple configuration. In addition, the
first zones 31a and 31b have a shape that can be narrowed toward the front, whereby the phase
adjustment function can be obtained and the sound quality can be improved.
[0041]
Further, according to the present embodiment, the partition wall 17 extends forward between the
cone speaker units 5a and 5b. The unit-specific return horns 21 a and 21 b are bent forward by
the partition wall 17 and then join. With this configuration, it is possible to prevent the sound
pressure from being transmitted between the unit-specific return horns 21a and 21b, and the
sound pressure can be effectively increased.
[0042]
The preferred embodiments of the present invention have been described above. However, the
present invention is not limited to the above-described embodiment, and it goes without saying
that those skilled in the art can modify the above-described embodiment within the scope of the
present invention.
[0043]
As described above, the speaker device according to the present invention can be downsized, has
effects such as high sound pressure and constant directivity, and is useful as a multi-cone type
speaker device or the like.
[0044]
Transverse sectional view of the speaker device according to the embodiment of the present
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invention Longitudinal sectional view of the speaker device according to the embodiment of the
present invention Front view of the speaker device according to the embodiment of the present
invention Speaker according to the embodiment of the present invention Device perspective view
Explanation of sign
[0045]
Reference Signs List 1 speaker device 3 enclosure 5a, 5b, 5c, 5d cone speaker unit 7 horn
portion 11a, 11b outer inclined wall 13a, 13b first inner inclined wall 15a, 15b second inner
inclined wall 17 partition wall 21a, 21b united return horn Part 23 Synthetic horn part 25 Merge
point 31a, 31b First zone 33a, 33b Second zone
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